This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A385735 #9 Aug 15 2025 09:11:05 %S A385735 1,2,3,4,5,7,6,11,12,16,8,23,9,29,30,40,10,53,13,70,17,78,14,87,15, %T A385735 106,41,129,18,154,19,164,71,185,24,214,20,245,79,282,21,323,22,366, %U A385735 107,378,25,413,42,460,130,513,26,572,43,633,165,647,27,662,28,729 %N A385735 Inverse permutation to A385661. %H A385735 Rémy Sigrist, <a href="/A385735/b385735.txt">Table of n, a(n) for n = 1..10000</a> %H A385735 Rémy Sigrist, <a href="/A385735/a385735.gp.txt">PARI program</a> %H A385735 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %e A385735 A385661(42) = 49, so a(49) = 42. %o A385735 (PARI) \\ See Links section. %Y A385735 Cf. A385661. %K A385735 nonn %O A385735 1,2 %A A385735 _Rémy Sigrist_, Aug 09 2025